Probably pointless as Google locks down the supposedly open Nexus devices so they can't see other storage options, Google's on a crusade to sell cloud storage hence the removal of basics like Micro SD cards, USB Mass Storage and USB OTG. Unfortunately that and their similar crusade to make everything into a Google + feature is really starting to put me off the company.

I believe there is a workaround called Nexus Media importer or something similar but it's an app you need to pay for and results can't be guaranteed.

Probably pointless as Google locks down the supposedly open Nexus devices so they can't see other storage options,

That's true, but you can see the storage if you connect the Nexus to a PC (and presumably a Mac). In that case, it behaves like an external drive, letting you see the files and folders, and transfer files.

But connecting a Nexus to Kindle won't do that. You would have to use a PC as an intermediary.

Thank you, guys, all very helpful.
I agree with you, Teknikal, Google are becoming as anal as Apple and rather than cornering the market I think they will end up losing out as other friendlier tech comes out.

I don't usually defend Google, but they are much more open than Apple. The very fact that you can see the files and folder on your Nexus demonstrates that. There's no chance of doing that with an iPod or iPad.

I was thinking of buying an iPad recently. One of the first things the salesman said to me was that the latest model had a new connector. I immediately thought proprietary connector, and that reminded me of all the problems I'd had with my iPod - like not being able to get a reasonably-priced microphone for it, thanks to being locked into the Apple store.

For now, Google is definitely an improvement on Apple. Of course, that might change.